Battery charger



FIG. 1 is a front, bottom and left side perspective view of a battery charger showing my new design;

FIG. 2 is a front elevational view of the battery charger shown on a reduced scale;

FIG. 3 is a rear elevational view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a left side elevational view thereof;

FIG. 7 is a right side elevational view thereof; and,

FIG. 8 is a top, rear and right side perspective view thereof shown on the same scale as FIG. 1. 

The ornamental design for a battery charger, as shown and described. 